Abstract: The heavy oil pool in No.1 block of Jinlou oil field is characterized by reservoirs of excellent physical properties and crude oil of high viscosity.Each member has its independent oil-water boundary and active edge water,so it is easy to occur the edge water flooding.Even if corresponding measures are taken promptly,it is still hard to recover the production performance before the water flooding.At the principle of different treatment to different water flooding condition,the method and effect of performance partition plus heat treatment,tri-line method and early prevention method are highlighted in the paper.The three kinds of methods are easy to handle in the field and take effect in the similar blocks.